whitney



(N0 Modl.) 7 2 eeeeeeeeee et 1. J. A. WHITNEY.

APPARATU$ FOR MAKING CURVED METAL PIPE. No. 368,314. Patented Aug. 16,1887-.

(No Model.)' 2 Sheets-Sheet 2.

J. A. WHITNEY.

APPARATUS FOR MAKING OURVED METAL PIPE. No. 368,314. Patented Aug. 16,1887.

xi i-155g f A *1/ :I

NITED STATES APPARATUS FOR MAKING CURVED METAL PIPE.

SPECIFICATION forming part of Letters Patent No. 368,314, dated August16, 1887.

Application filed May 13, 1887. Serial No. 238,155. (No model.)

To all whom it may concern.-

Be it known that I, J AMES A. XVHITNEY, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented new and useful Improvements in the Manufacture of Curved Pipes,Plumbers Traps, &c., of which the following is a specification.

The invention is designed for the manufacture of curved pipes,water-traps, &c., of any suitable plastic material.

It comprises certain novel means whereby such articles may be producedwith facility and chcapness.

Figure 1 is a vertical sectional view; Fig. 2, a side view, as seen froma standpoint different from that of Fig. 1; and Fig. 3 is a horizontalsectional view, on the line mm, of an apparatus embracing orillustrating certain features of my invention. Fig. at is a verticalsectional View illustrating a further feature of my said invention.Figs. 5 and 6 are horizontal sectional views taken 011 the lines y y andz 2, respectively, of Fig. 4. Fig. 7 is a side and partial sectionalview further illustrating my said invention.

A is a barrel or cylinder, in the top or cap a of which is an opening inwhich is placed a core, B. The space 0, between the walls I) of thisopening and the said core, forms an annular die through which theplastic material, (indicated at the broken lines 0,) is forced from thecylinder A in the production of the curved pipe or traps.

Placed within the cylinder A, and capable of longitudinal movementtherein, are two (or more,ifdesired) pistons,DD, each ofwhieh has itsside nearest the center of the cylinder flat, or substantially so,whileits outer side or-sur face is curved to correspond to the curvature ofthe adjacent inner surface of the cylinder. These pistons D D areprovided with suitable mechanical means for independently moving themlongitudinally with reference to the cylinder. By thus providing aplurality of pistons within a single cylinder and combining with saidpistons mechanism for operating them independently of each other I amenabled to produce a compact and comparatively inexpensive machine forthe purposes herein mentioned, and one capable of easy and convenientoperation. By having the pistons flat on their inner sides and on theirouter sides curved to conform to the inner surface of the cylinder I amenabled to make the apparatus very compact, and also obtain otheradvantageous results.

For the production of curved pipes, traps, &e., of soft or very plasticmaterial, the pistons may be independently actuated by levers E,connected to their outer extremities and suitably fulcrumedas, forexample, upon pivoted links d, as shown in Fig. 2or, when desired, thepiston may be provided with stems 0, each of which connects with the ramor plunger of a suitable hydraulic press, the cylinder F of which isindicated in Fig. 7.

\Vhcn the apparatus is to be used for making the articles of lead orother soft metahthe pistons are extended into a single hydrauliccylinder, G, which is internally divided by a longitudinal partition,f,into two parts or hydraulie chambers, 9. These parts or chambers g aredistinct from each other, and each is provided with the usual appliancesused in a hydraulic press to actuate the plunger or ram thereof, so thatby this means the two pistons may be independently actuated by hydraulic power. \Vhen the pistons are moved inward at equal speed, thematerial a will be forced from the die 0 in the form of a straight tube.Vhen one of the pistons moves faster than the other, the material infront of it is forced out from the corresponding side of the die 0 ingreater quantity and more rapidly than at the other side of the die,thereby causing the issuing material to curve in the direc tion of theside at which the smaller quantity passes out. The pipe or trap is thuscurved in one direction or the other, as may be desired, by giving therequisite relatively greater velocity to the one or the other of thepistons.

The core B may be short and be tapered at its inner end, as shown inFig. 1, in which case it is held in place and position by radial wingsm.

When desired, the core may have its outer end sustained by the wings m,but with a cylindrical stem, n, extended inward through a bore formed bycoincident grooves'in the flat inner faces of the pistons, as shown inFigs. 4 and 5; or, as shown in Fig. 7, the stem a may extend through thelength of the cylinder, with its rear extremity secured to a cross-pin,r, at the rear end of the cylinder. In this case the inner sides of thepistons must be flattened for a portion of their length, as shown at u.

The flat inner sides of the hydraulic plungers, bearing upon theopposite sides of the fixed partition in the hydraulic cylinder shown inFigs. 4. and 6, prevent the pistons from turning around Within thecylinder, having adie, as aforesaid, which turning, if permitted, wouldtend to give an undesirable twist to the material while issuing from thedie;

It is the parallel positions of the pistons placed longitudinally withthe axis of the die which constitutes the principal feature of myinvention, so as to provide a compact and direct-acting machine, whichwill not require any substantial bendin the general directions of theopposite parts of the stream of lead toward the die, ascontradistinguished from amachine having pistons arranged in the sameaxial line and at right angles to the longitudinal axis of the disk.

What I claim as my invention is 1. In a machine for making curved tubes,pipes, 8tc., the combination of two parallel or substantially parallelpistons, with a receiver for holding the plastic metal or material, adie secured to said receiver, and means for simultaneously andindependently actuating said parallel pistons with reference to the die,substantially as and for the purpose herein set forth.

2. In a machine for making curved tubes, pipes, &c., the combination oftwo parallel or substantially. parallel pistons, a receiver for holdingthe plastic metal or material, a die secured to said receiver, andhydraulic mechanism for simultaneously and independently actuating saidpistons, substantially as and for the purpose herein set forth.

'2 I seasia.

said pistons, substantially as and for the purpose herein set forth. 7

5. The combination, with a cylinder having an annular die, of pistonshaving flat inner faces and outer surfaces curved to conform to theinternal surface of the cylinder, and a plurality of hydraulic pressesarranged to independently actuate the said pistons, substantially asandfor the purpose herein set forth.

6. The combination, with a cylinder provided'with an annular die,ofpistons having flat inner faces and outer surfaces curved to conform tothe internal shape of the cylinder, and a hydraulic cylinder having apartition which divides it into a plurality of hydraulic chambersarranged to independently operate the said pistons, substantially as andfor the purpose herein set forth.

7. The combination, in a machine for the purpose stated, of a receiverfor holding the plastic material and forming the die, and coactingpistons arranged and operating side by side in longitudinal relation tothe axis of the die within said receiver, for the purpose stated.

JAMES A. WHITNEY.

Witnesses:

A. E. H. JOHNSON, \VM. B. MAOKRILLE.

